皮革 乙氧基化烷基酚 (APEO) 的测定 直接法

[中文适用范围]： 本文件介绍了一种测定皮革中乙氧基化烷基酚 (APEO) [壬基酚聚氧乙烯醚 (NPEOn，其中 2 ≤ n ≤ 16) 和辛基酚聚氧乙烯醚 (OPEOn，其中 2 ≤ n ≤ 16)] 的方法。这种直接法尤其适用于需要检查大量皮革样品中是否存在乙氧基化烷基酚的情况。该方法要求使用带有三重四极杆质谱 (MS/MS) 的液相色谱 (LC) 来识别和量化乙氧基化烷基酚。注 1 在皮革工业中，最常用的乙氧基化烷基酚是 NPEO，平均含有 9 个 EO。在典型的皮革加工温度 40°C 至 55°C 下，它在水中的最佳浊点。注 2 本文件和 ISO 18218-2 使用不同的溶剂从皮革中提取乙氧基化烷基酚。因此，对于皮革中的乙氧基烷基酚含量，这两种分析方法预计会给出相似的趋势，但不一定给出相同的绝对结果。 [外文原描述]： This document is a method for determining ethoxylated alkylphenols (APEO) [nonyphenol ethoxylate (NPEO n , where 2 ≤ n ≤ 16) and octylphenol ethoxylate (OPEO n , where 2 ≤ n ≤ 16)] in leather. This direct method is especially suitable when a larger number of leather samples are to be checked for the presence of ethoxylated alkylphenols. This method requires the use of liquid chromatography (LC) with a triple quadrupole mass spectrometer (MS/MS) to identify and quantify the ethoxylated alkylphenols. NOTE 1 In the leather industry, the most commonly used ethoxylated alkylphenol is the NPEO, with an average of 9 EO. It has an optimum cloud point in water for the typical leather processing temperatures of 40 °C to 55 °C. NOTE 2 This document and ISO 18218-2 use different solvents for the extraction of the ethoxylated alkylphenols from leather. Consequently, the two analytical methods are expected to give similar trends but not necessarily the same absolute result for the ethoxylated alkylphenol content in leather.